DocumentCode
3500295
Title
Ultra low noise low power LDO design
Author
Mannama, Vello ; Sabolotny, Rein ; Strik, Viktor
Author_Institution
National Semicond., Tallinn
fYear
2006
fDate
2-4 Oct. 2006
Firstpage
1
Lastpage
4
Abstract
A low dropout regulator (LDO) with ultra low output noise is described. The proposed structure of LDO with internal noise filter is discussed and related design problems along with their possible solutions are highlighted. The LDO ensures output noise below 1OmuV (10Hz to 100kHz) having quiescent current about 25muA for no load. Maximum output current of 100mA is available. The LDO is stable with a 220nF ceramic output capacitor. In testing, PSRR above 75dB (1kHz), dropout below 80mV (Vout>2.5V), and transient peaks below 30mV (1mA ... 80mA output step) were measured. The solution is patent pending and has been introduced to low noise LDO LP5900
Keywords
low-pass filters; low-power electronics; voltage regulators; 10 to 100000 Hz; 100 mA; 220 nF; LDO LP5900; low dropout regulator; low-pass filter; noise filter; Capacitors; Circuit noise; Circuit testing; Low pass filters; Noise figure; Noise level; Regulators; Resistors; Semiconductor device noise; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Baltic Electronics Conference, 2006 International
Conference_Location
Tallinn
ISSN
1736-3705
Print_ISBN
1-4244-0414-2
Electronic_ISBN
1736-3705
Type
conf
DOI
10.1109/BEC.2006.311074
Filename
4100295
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